Drawing method of traditional national day musical instrument board

(1) The strength of pulling the rubber band by hand; Change the position of the left hand to change the length of the vibrating rubber band.

(2) stringed instruments.

Test and analysis: the loudness of sound is related to the vibration amplitude of the object; Tone is related to vibration frequency. If you want to change the loudness, you must change the vibration amplitude, and you need to apply different forces by hand. If you want to change the tone, you must change the frequency of vibration, and you need to change the length of vibration by hand, thus changing the frequency. The vibrating object of this instrument is a rubber band, which is similar to a string, so it belongs to a stringed instrument.